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Falling Film Wastewater MVR Evaporator

MVR Evaporator For Crystallization

Chemical Desalination MVR Evaporator

Basic Infomation

Place of Origin: Jiangsu，China

Brand Name: HANPU

Certification: ISO,CE

Model Number: MVR

Payment & Shipping Terms

Packaging Details: Bulk

Delivery Time: 90days

Payment Terms: T/T,L/C,D/A,D/P,Western Union

Supply Ability: 1 set/month

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Falling Film Wastewater MVR Evaporator System For Crystallization Chemical Desalination

Product Description

Falling Film Wastewater MVR Evaporator System For Crystallization & Chemical Desalination

Engineer-to-order falling film MVR (Mechanical Vapor Recompression) evaporator for wastewater concentration, chemical desalination, and salt crystallization. Thin-film vacuum boiling protects heat-sensitive streams while MVR recycles latent heat, delivering low OPEX, deep TDS reduction, and continuous, stable operation for ZLD schemes.

Key Benefits

High energy efficiency: Electric-driven vapor recompression minimizes fresh steam after start-up.
Desalination & crystallization: Drives brine to supersaturation for salt recovery and reduced discharge.
Low ΔT, high quality: Falling-film duty preserves organics and limits thermal degradation/foaming.
Scaling mitigation: Optimized ΔT/LMTD and film distributors, antiscalant dosing, CIP-ready design.
Automated uptime: PLC/HMI recipes, alarms, historian, and remote diagnostics for 24/7 operation.

Process & Thermal Economy

Secondary vapor is mechanically compressed to elevate saturation temperature and reused as the heating medium. Even film distribution over vertical exchangers maintains high heat-transfer coefficients; controlled residence time and pressure/ΔT setpoints enable predictable desalination and crystallization with low specific energy.

Materials & Cleanability

Wetted parts in SS316L/duplex (Ti/Hastelloy optional). Drainable layouts, large access for inspection, validated CIP, and elastomer/material selections per chemistry (chlorides, solvents, acids/alkalis).

Process Overview -- Wastewater Desalination to Crystals

Flow diagram: feed conditioning → falling-film MVR evaporation (vacuum) → condensate polishing → crystallizer → centrifuge/dryer → solids discharge/ZLD

Feed conditioning: screening/filtration, softening or pH trim, antiscalant to control Ca/Mg/Si scaling.
MVR falling film (vacuum): VFD compressor controls ΔT; shell vacuum defines boiling point.
Crystallization: seeded growth (DTB/OSLO/FC) for targeted PSD and purity; mother liquor recycle.
Condensate polishing: filters/RO/AC to meet reuse or discharge limits (conductivity/TOC guard).
Solids handling/ZLD: centrifuge -> dryer -> regulated disposal or resource recovery.

Key Components

Falling-film evaporator body with film distributors and vapor-liquid separator
MVR mechanical vapor compressor (turbo/Roots) with VFD for ΔT/capacity control
Surface condenser, vacuum/NCG handling, preheaters/heat recovery HX
Crystallizer, centrifuge, dryer; condensate polishing skid
PLC/HMI/SCADA; instruments (T/P/flow/cond/level); CIP and antiscalant dosing

Performance & Sizing

Parameter	Typical Range*
Operation	Continuous, vacuum
Electric use (MVR)	~15-40 kWh per ton of water evaporated
Shell pressure	~6-25 kPa(abs), duty-dependent
Desalination depth	Up to crystallization/solid discharge (feed-dependent)
Materials	SS316L / duplex; Ti/Hastelloy on request

*Actual performance depends on feed salinity/COD, fouling tendency, compression ratio, and crystallizer design.

FAQ

Can it follow membranes to reach ZLD?

Yes--common flowsheets pair RO/NF pre-concentration with falling-film MVR and a crystallizer for final solids discharge.

How do you control scaling on high-TDS streams?

Through pretreatment, optimized film ΔT/velocity, antiscalant dosing, and scheduled CIP with online fouling indicators.

What condensate quality is achievable?

Low conductivity/TOC suitable for reuse after polishing; quality guards ensure compliance with site limits.

Application

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Contact Person :	Mr. Jim(General Director)
Tel :	+8613962270688
Fax :	86-512-58797983

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